An integrated dual-output grid-to-vehicle (g2v) and vehicle-to-grid (v2g) onboard charger for plug-in electric vehicles

Patent metadata

Field	Value
Publication number	US-2016016479-A1
Application number	US-201514739822-A
Country	US
Kind code	A1
Filing date	Jun 15, 2015
Priority date	Jun 13, 2014
Publication date	Jan 21, 2016
Grant date	—

Abstract

An integrated and isolated onboard charger for plug-in electric vehicles, includes an ac-dc converter and a dual-output dc-dc resonant converter, for both HV traction batteries and LV loads. In addition, the integrated and isolated onboard charger may be configured as unidirectional or bidirectional, and is capable of delivering power from HV traction batteries to the grid for vehicle-to-grid (V2G) applications. To increase the power density of the converter, the dual-output DC-DC resonant converter may combine magnetic components of resonant networks into a single three-winding electromagnetically integrated transformer (EMIT). The resonant converter may be configured as a half-bridge topology with split capacitors as the resonant network components to further reduce the size of converter. The integrated charger may be configured for various operating modes, including grid to vehicle (G2V), vehicle to grid (V2G) and high voltage to low voltage, HV-to-LV (H2L) charging.

First claim

What is claimed is:

1 . An integrated power electronics interface comprising:
a first stage power factor correction AC-DC converter; and a second stage integrated DC-DC converter including:
a dual-output CLLLC resonant converter; and
a LLC converter.

2 . The integrated power electronic interface according to claim 1 , wherein the dual-output CLLLC resonant converter is intertwined with the LLC converter.

3 . The integrated power electronic interface according to claim 1 , wherein the LLC converter is one of a half-bridge LLC converter or a full-bridge LLC converter.

4 . The integrated power electronic interface according to claim 2 , wherein the dual-output CLLLC resonant converter is intertwined with a half-bridge LLC converter.

5 . The integrated power electronic interface according to claim 2 , wherein the dual-output CLLLC resonant converter is intertwined with a full-bridge LLC converter.

6 . An integrated power electronics interface comprising:
a first stage, the first stage including:
a power factor correction AC-DC converter; and
a DC/DC converter; and
a second stage integrated DC-DC converter.

7 . The integrated power electronics interface according to claim 6 , wherein the power factor correction AC-DC converter of the first stage is a diode bridge.

8 . The integrated power electronics interface according to claim 7 , wherein the diode bridge is one of a full-bridge diode bridge or a half-bridge diode bridge.

9 . The integrated power electronics interface according to claim 6 , wherein the first stage DC-DC converter is selected from the group consisting of:
(a) a single-leg boost converter; (b) a single-leg buck-boost converter; (c) an interleaved boost converter; (d) an interleaved buck-boost converter; (e) a single-ended primary-inductor converter (SEPIC) converter; (f) a bidirectional half bridge converter; (g) a bidirectional full bridge converter; (h) a bidirectional totem pole converter; (m) a bidirectional interleaved half0bridge converter; (n) a bidirectional interleaved full-bridge converter; (l) a bridgeless boost PFC converter; (l) an interleaved bridgeless boost PFC converter; (i) a bridgeless interleaved resonant PFC boost converter; and (j) a phase shifted semi-bridgeless converter.

10 . The integrated power electronics interface according to claim 6 , wherein the second stage integrated DC-DC converter includes a three-winding transformer.

11 . The integrated power electronics interface according to claim 10 , wherein the three-winding transformer is one of a transformer configured with individual, discrete inductors and an electromagnetically integrated transformer.

12 . The integrated power electronics interface according to claim 10 , wherein the electromagnetically integrated transformer includes:
a first EE core defining a base portion, a central leg and first and second peripheral legs; a second EE core defining a base portion, a central leg and first and second peripheral legs; a primary winding wound around the central leg of the first EE core between the first peripheral leg and the central leg and between the second peripheral leg and the central leg of the first EE core; a secondary winding wound around the central leg of the second EE core between the first peripheral leg and the central leg and between the second peripheral leg and the central leg of the second EE core; and a tertiary winding wound around the central leg of the second EE core between the first peripheral leg and the central leg and between the second peripheral leg and the central leg of the second EE core.

13 . The integrated power electronics interface according to claim 12 , wherein edges of the legs of the first EE core align with edges of the legs of the second EE core and the secondary winding and tertiary winding are adjacent to one another along an axis defined by the central leg of the first EE core and the central leg of the second EE core.

14 . The integrated power electronics interface according to claim 12 , wherein edges of the legs of the first EE core align with edges of the legs of the second EE core and the secondary winding is formed concentrically around the tertiary winding and both the secondary winding and the tertiary winding are formed concentrically around the central leg of the second EE core.

15 . The integrated power electronics interface according to claim 13 , wherein a peripheral winding gap is formed between a lower edge of the primary winding on the first EE core and an upper edge of the secondary winding on the second EE core.

16 . The integrated power electronics interface according to claim 13 , wherein a central gap is formed between the central leg of the first EE core and the central leg of the second EE core.

17 . A three-winding electromagnetically integrated transformer for an integrated power electronics interface(/second stage integrated DC-DC converter) comprising:
a first EE core defining a base portion, a central leg and first and second peripheral legs; a second EE core defining a base portion, a central leg and first and second peripheral legs; a primary winding wound around the central leg of the first EE core between the first peripheral leg and the central leg and between the second peripheral leg and the central leg of the first EE core; a secondary winding wound around the central leg of the second EE core between the first peripheral leg and the central leg and between the second peripheral leg and the central leg of the second EE core; and a tertiary winding wound around the central leg of the second EE core between the first peripheral leg and the central leg and between the second peripheral leg and the central leg of the second EE core.

18 . The three-winding electromagnetically integrated transformer according to claim 17 , wherein edges of the legs of the first EE core align with edges of the legs of the second EE core and the secondary winding and tertiary winding are adjacent to one another along an axis defined by the central leg of the first EE core and the central leg of the second EE core.

19 . The three-winding electromagnetically integrated transformer according to claim 17 , wherein edges of the legs of the first EE core align with edges of the legs of the second EE core and the secondary winding is formed concentrically around the tertiary winding and both the secondary winding and the tertiary winding are formed concentrically around the central leg of the second EE core.

20 . The three-winding electromagnetically integrated transformer according to claim 17 , wherein a peripheral winding gap is formed between a lower edge of the primary winding on the first EE core and an upper edge of the secondary winding on the second EE core.

21 . The three-winding electromagnetically integrated transformer according to claim 17 , wherein a central gap is formed between the central leg of the first EE core and the central leg of the second EE core.

Assignees

• Univ Maryland

Inventors

• Khaligh Alireza
• Tang Yichao

Classifications

• B60L2210/30

  AC to DC converters · CPC title

• H01F38/08

  High-leakage transformers or inductances · CPC title

• B60L58/20

  having different nominal voltages · CPC title

• Y04S10/126

  the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G] · CPC title

• H01F27/38

  Auxiliary core members; Auxiliary coils or windings · CPC title